mara

Mara means demon, or demonic influence, that hinders the practice of virtue. It may be an external spirit or an aspect of our own imperfect condition. All hindrances on the path to liberation are subsumed under the four maras. The first mara is the mara of the aggregates.[…]The second of the maras is the mara of the afflictions, which are the same as the afflictive obstructions. They are identified as a mara because they precipitate all harmful actions, from malicious gossip to murder.[…]The third mara is Devaputra, literally "son of a god," an external troublemaker who specializes in interfering with beings who are endeavoring to achieve something positive.[…]The last mara is the mara of death.

The mara is the spirit that causes illness, accidents, and mishaps. The only protection against it is another mara who befriends a person or a group. A mara who becomes friendly is called a gunik. This transformation occurs when a mara comes to a person in a dream and states a desire to be friendly. But there are deceitful maras who pretend to be friendly, yet will betray the person who trusts them.